A film-coated nickel electrode for alkaline storage battery and preparation method thereof

A technology for nickel electrodes and storage batteries, applied in the field of film-coated nickel electrodes for alkaline storage batteries and its preparation, can solve the problems of high production cost of nickel electrodes, shedding of active materials, short cycle life, etc., and improve specific capacity and utilization rate , Coating thickness increases, the effect of prolonging the service life

Active Publication Date: 2017-07-25
ZHANGJIAGANG SMARTGRID FANGHUA ELECTRICAL ENERGY STORAGE RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The present invention aims to overcome the deficiencies of the prior art and provide a simple and easy film-coated nickel electrode for alkaline storage batteries and its preparation method to solve the problems of high production cost, short cycle life, small surface capacity and specific capacity of the nickel electrode. Low, active substance shedding and other defects

Method used

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  • A film-coated nickel electrode for alkaline storage battery and preparation method thereof

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Embodiment 1

[0045] The following is an embodiment of the film-coated nickel electrode for alkaline accumulator of the present invention, the structure and the method of making are as described above, and the specific implementation details are as follows:

[0046] With the foamed nickel sheet of porous loose structure as the conductive matrix, each component (according to mass fraction) in the described nickel electrode slurry is: nickel hydroxide 34%, nickel powder 34%, cobalt oxide 5%, water 25%, CMC 0.7% and PTFE 1.3%. The alkali-resistant diaphragm 3 is a modified PP non-woven fabric, and the nylon fiber filament with a diameter of 0.5 mm is used as the suture 2 to sew the alkali-resistant diaphragm 3 and the sheet nickel electrode 4 into one body.

Embodiment 2

[0048] The following is an embodiment of the film-coated nickel electrode for alkaline accumulator of the present invention. The structure and manufacturing method are referred to above, and the specific implementation details are as follows:

[0049] With a plurality of (more than 2) foamed nickel sheets of porous and loose structure as the conductive matrix, each component (according to mass fraction) in the nickel electrode slurry is: 50% of cobalt-coated nickel hydroxide, 30% of nickel powder, Toner 3%, Absolute Alcohol 15%, Polyvinyl Alcohol 1%, and PTFE 1%. After rolling, cutting, welding and shaping, the sheet-shaped nickel foam electrode is produced. The alkali-resistant diaphragm 3 is nylon woven cloth, and the alkali-resistant fiber filament with a diameter of 0.2 mm is used as the suture 2 to sew the alkali-resistant diaphragm 3 and the sheet-shaped nickel electrode 4 into one body. Finally, the alkali-resistant sealing material 704 (vulcanized silicone rubber) is ...

Embodiment 3

[0052] The following is an embodiment of the film-coated nickel electrode for alkaline accumulator of the present invention. The structure and manufacturing method are referred to above, and the specific implementation details are as follows:

[0053] The foamed nickel sheet with a porous and loose structure is used as a conductive matrix, and the components (according to mass fraction) in the nickel electrode slurry are: 55% of cobalt-coated nickel hydroxide, 30% of nickel powder, 12% of distilled water, and 1% of CMC and PTFE 2%. After rolling, the active material slurry is loaded again for secondary rolling. After drying and shaping, a bare electrode chip (that is, a sheet-shaped nickel electrode 4) is obtained. The alkali-resistant diaphragm 3 is a polyethylene woven cloth, and a nylon wire with a diameter of 0.3 mm is used as the suture 2 to sew the alkali-resistant diaphragm 3 and the sheet nickel electrode 4 into one body. Finally, the alkali-resistant asphalt dots ar...

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Abstract

The invention discloses a film-coated nickel electrode for an alkaline storage battery and a preparation method thereof, comprising a conductive matrix containing active material slurry, an alkali-resistant diaphragm and an alkali-resistant suture. The nickel electrode is made by wrapping the alkali-resistant diaphragm around the conductive matrix containing the active material slurry, and sewing it into one body through the alkali-resistant suture. The film-coated nickel electrode for alkaline storage battery disclosed in this case and its preparation method can make similar foamed nickel electrodes applied to liquid flow batteries, which not only maintains the characteristics of large specific surface area and large total capacity of foamed nickel electrodes, but also solves the problem of It solves the problem of active material falling off and prolongs the life of the nickel electrode; it allows the thickness of the conductive substrate coated with the nickel hydroxide active material electrode slurry to increase, thereby improving the effective specific capacity and utilization rate of the nickel electrode; The method has the advantages of simple process, high efficiency, low cost and stable and reliable product quality.

Description

technical field [0001] The invention relates to an alkaline accumulator, in particular to a film-coated nickel electrode for an alkaline accumulator and a preparation method thereof. Background technique [0002] The active material nickel oxyhydroxide / nickel hydroxide is widely used as an electrode in a variety of alkaline battery systems, such as nickel-hydrogen batteries, metal hydride nickel batteries, iron-nickel batteries or zinc-nickel batteries. [0003] There are several types of conventional nickel electrodes: [0004] (1) Bag (box) nickel electrode, manufacturing method: by mixing the active material with the conductive material graphite, etc., filling the mixture into a bag or putting it in a nickel-plated perforated steel box, and making it after compaction into electrodes. The advantages of the bag (box) nickel electrode are: good mechanical strength, high reliability, and cheap materials; the disadvantages are low specific capacity and specific energy, and p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/32H01M4/66H01M2/16H01M4/26H01M50/46
CPCH01M4/24H01M4/26H01M4/32H01M4/52H01M4/661H01M50/409Y02E60/10
Inventor 何柯程杰杨裕生文越华曹高萍徐艳赵鹏程陆骏
Owner ZHANGJIAGANG SMARTGRID FANGHUA ELECTRICAL ENERGY STORAGE RES INST
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